Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
2011-08-09
2011-08-09
Zarroli, Michael C (Department: 2839)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S114000
Reexamination Certificate
active
07994675
ABSTRACT:
A rotor having a substantially cylindrical configuration for use in a brushless direct current electric motor having a high torque to size ratio. The rotor has an outer peripheral surface. The rotor also has a central rotor shaft and a first and second retaining ends mounted on the central rotor shaft and spaced from one another. The rotor also has a plurality of magnets configured to provide a magnetic flux with a stator disposed around the central rotor shaft. The magnets are radially disposed on the shaft and the rotor also has a sheath. The sheath is crimped around the radially disposed permanent magnets, and holds the magnets around the shaft. The sheath is lightweight and minimizes a gap between the permanent magnets and the stator to provide for an electromagnetic flux between the magnets and the stator windings, and for rotation of the central rotor shaft.
REFERENCES:
patent: 4937485 (1990-06-01), Mihalko
patent: 5973426 (1999-10-01), Fujinaka et al.
patent: 6717319 (2004-04-01), Suzuki et al.
patent: 6750580 (2004-06-01), Lai et al.
patent: 6800970 (2004-10-01), Aoshima
patent: 7337524 (2008-03-01), Wolters
Jones Robert M.
Lisiecki Joseph M.
Shedd, Esq. Jill C
Zarroli Michael C
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